diff --git a/doc/src/sgml/plpgsql.sgml b/doc/src/sgml/plpgsql.sgml
new file mode 100644
index ca2c2b5..4cf9be9
*** a/doc/src/sgml/plpgsql.sgml
--- b/doc/src/sgml/plpgsql.sgml
*************** arow RECORD;
*** 343,348 ****
--- 343,349 ----
        is specified, an assignment of a null value results in a run-time
        error. All variables declared as <literal>NOT NULL</>
        must have a nonnull default value specified.
+       Equals (<literal>=</>) can be used instead of <literal>:=</>.
       </para>
  
       <para>